如果您尝试运行以下代码,您将看到 (![]+[])[+1]返回"a"; (![]+[])[+2]返回"l"; (![]+[])[+3]返回"s". 等等.为什么?
(![]+[])[+1]
(![]+[])[+2]
(![]+[])[+3]
javascript
javascript ×1